Attachment for mechanical hammers or the like



June 20, 1933. w. F. OGORMAN 1,915,07

ATTACHMENT FOR MECHANICAL HAMMERS OR THE LIKE original Filed Jan. 14, 195o F1- j Z Ill/l' ATTORNEY Patented June 2o, '1933 WILLIAM r. oeonimrr, yor' NEW YORK, N. Y., ASSIGNOR TO HYMAN BYRON, GF BROOKLYN, NEWl YORK l ATTACHMENT FOB HEHANICL HAMJIERS 0R THE `LIKE Application led January 14, 1930, Serial No. 420,651. Renewed April 19, 1988.

i preventing the accidental removal of the rivet-set or other toolfrom the barrel of the hammer.

Another object is to provide an operative connection between the device and a controller for the motive power of the hammer.v

A stillfurther object is to provide an arrangement whereby the tool holding device may be moved readily intoa releasing posi- H tion to enable the insertion or removal of a tool. I

Other objects of the invention will appear from the .following specification.

Referring to the drawing,

Fig. 1 is an elevation of a riveting hammer with my invention applied thereto, a part being shown in section;

Fig. 2 is a similar view of the same mechanism with some of the parts shown in different positions;

Fig. 3 is a transverse section on the line 3-3 of Fig. 1;

. Fig.v 4 is a transverse section on the line 4-4 of Fig. 1 Fig. 5 is a side elevation of a pneumatic 3 clay digger equipped with a modified form of the invention; and

Fig. 6 is atransverse section on the line 6 6 of Fig. 5.

Like characters'of reference designate similar parts on the various figures of thedraw- 1n d() designates the barrel of a pneumatic riveting hammer, within which is a reciprocatory hammer piston, not shown. At one '10 end of this barrel is a handle 11 in which is C is shown in Figs. 1, 2, 3 and 4,' a semi-circular In the embodiment ofthe invention which collar is provided which fits over the upper half of the neck 17 between the shoulders 18 and 19. g This is somewhat narrower than the space between the shoulders and its rear edge 21 is beveled to fit into the undercut 55' portion of shoulder 19. -A strap 22 extends hackwardly from collar 20 along the upper surface of the barrel 10 to a valve 23 to winch it is affixed'. lThe valve is slidable longitudinallyin a valve casing 24 and a valve head 00 25. In the position in which it is shown in Fig. 1 it closes ports 26 in its casing 24 to prevent the flow of air from the trigger-con trolled air-valve to the barrel 1() through a passage 27. 5 The strap 22 passes under a retainin ring which surrounds the barrel 10 and is saped to form a Spanner 3l over the strap of sullcient width to allow for a limited rotation of the'ring. Spring lingers 32, which are pref- 70 crably formed by cuts in the ring, press inwardly from the rin and are arranged to enter annularly space grooves 33 in the outer l surface of the barrel 10 to prevent the ring from sliding olf the barrel inadvertently. But the ring can be removed if desired by first turning it sufficiently to move the iin ers out of the grooves. When it is desire to remove the rivet-set, the ring is moved back on the barrel to some such position as that B0 shownat 30A in Fig. 2 when the collarmay be raised to the position shown at 20A to enable the removal of the rivet-set and the insertion of another one.

Now bef/ore going into a detailed descrip- B5` tion of the modifications shown in Figs. 5 and 6, the operation of the parts already described will bepointed out. The manner of insert-V ing a rivet-set or other tool has been shown.

When it is in place, the ring 30 is slid on the 90 barrel up to its forward position, where it serves to hold-the collar 20 seatedI on the neck 17. This will serve to prevent the accidental removal of thetool from the hammer. Assume that the parts are in the positions shown in Fig. 2 with the valve 23 back in' position to open the ports 26: an accidental pressure on the trigger 12 will cause a blow to be struck on the rivet-set to drive it out wardly. This will cause shoulder 19 to en- 160v l gage collar 20, which in turn will move valve I 23 to its Fig.- 1 position to shut oil the air passage 27. At the same time the beveled edge 21 of collar 20 will pass into the under- 5 cut portion of shoulder 19 to more securely with suiicicnt pressure t0 open the ports 26.

This wili occur by engagement of shoulder 18 with collar 20' and the transmission of the movement thus obtained, through strap 22 to valveniember 23; A spring 28 may be inserted back of the valve23 if desired, but under usual conditions this is not necessary. If the workman inadvertently or intentionally releases the pressure of the rivet-set from the work without releasing the triggenthe'rnotive fluid will be shut oil automatically by the valve 23.

The tool shown in Fig. 5 is a pneumatic clay digger. Its barrel is designated by Hifi, its handle by 11A, its trigger by 12A, its trigger pivot by 13A. and its manual control valve stein by 14A.. At the other end of the barrel is a clay chisel, a part of `which is shown at 151i. This is provided with a shank 16A which 'ts into the barrel and with a noch Ufa hetu'een spaced collars li. and MA, the latter of which is undercut.

The holding ldevice in this casecomprises a pair of spring fingers s0 which are adapted to engage the neclr 17A and to entend slightly below the center thereof. rlhe rear edge of these fingers is thin enough to enter the undercut part of shoulder 19A.. strap 22h runs boel: to a plunger fil slidably mounted in the handle HA.. kThis is arranged be pushed back against a lever 42 pivoted on the trigger pivot 13A, the other end ci which is arranged to depress the control valve stem 14A.

The operation of this arrangement is so similar to that of the device shown in the other figures that no further description is necessary.

Fiom the foregoing description it rnav be seen that by the simple expedient shown., the tool or die of a mechanical hammer prevented from falling out, or from being shot out if the motive power is turned on acci-s dentally when the tool is not applied to the work. Furthermore, the motive power is controlled by the application ci? the tool to the work, thus lfacilitating the use of the hammer, The device also increases the efficiency of the hammer as it cannot be operated when the tool has. been moved forwardly to close the ports 26. The trigger may be eliminated sitogetlier if desired` but in some cases it is desirable to retain it for the purpose of pro viding a variable power control.

The invention is applicable to many kinds of mechanical hammers, two of which have been shown, and to hammers which are actuintend no limitations other than those imposed by the appended claims.

What I claim is:

1.- The combination with a mechanical hammer and a removable tool having spaced shoulders and anl intermediate neck one of said Ishoulders having an undercut portion, of a holding device connected with the hammer and projecting forwardly therefrom, having on the projecting portion thereof a collar adapted to embrace the upper part of said neck, said collar having an edge a1'- ranged to engage the undercut portion of one of the shoulders on the tool to prevent lateral movement of the holding device.

2. The combination with a mechanical hammer and a removable tool having spaced shoulders and an intermediate neck one of said shoulders having an undercut portion,

of a holding device connected with the ham-4 mer :ind projecting 'forwardly therefrom, having on the projecting portion thereof a collar adapted to embrace the upper part of said neck, said collar having an edge c" ranged to engage the undercut portion of one the shoulders on the tool to prevent lateral movement of the holding device. and other means for holding the collar in engagement with the tool.

'3. The combination with a mechanical hammer and a removable tool having spaced shoulders and an intermediate neck, 01"' .a holding device connected with the ha imer and projecting forwardly therefrom, having on the proiecting portion thereois a coln lar adapted to embrace the upper part of scid neck. said collar heine; of resilient material and extending below the widest part of the neck, the ends of said collar being spaced apar; a distance less than the diameter of said necl..

e. The combination with a mechanics hammer and. a removable tool having spaced shoulders and. an intermediate neelr, one of scid shoulders having an undercut portion of e. holding device connected with the harnmer and projecting forwardly therefrom, having on the projecting portion thereof a collar adapted to embrace the upper part of said neck, said collar being' of resilient mau terisl and extending below thewidest part or" the neck, the ends of said collar being spaced apart a distance less than the diameter oi said neck and having an edge arranged to engage the undercut portion of one of the shoulders on the tool to prevent lateral movenient of the holding device.

5. The combination with, a mechanical lili) hammer and a removable tool having spacedshoulders and an intermediate neck, of a holding device connected with the hammer passing over the device to hold the collar inengagement withthe tool.

6. The combination with a mechanical hammer, a control device therefor and a' removable tool of a holding device extending from the control device to the tool parts of said tool and holding device having a lateral engagement and said holding device being arranged to prevent displacement of the tool and to cause movement of the tool relative to the hammer to actuate the control device.

7 The combination with a mechanical hammer, a control device therefor and a removable tool having spacedY shoulders with an intermediate neck. of a holding device extending frein the control device to the tool, having a collar adapted to embrace a part of said neck to prevent displacement of the tool and having means for preventing lateral movement of the (ollar from the neck of the tool, said holding device being arranged to cause movement of the tool relative to the hammer to actuate the control device.

8. 'lhe combination with a mechanical hammer having a body portion and a control device and a removable tool having spaced shoulders with an intermediate neck, of a holding device. connecting the control device C) be and the tool, said holding device extending along the body of the hammer and projecting forwardly therefrom, having on the projecting portion thereof a collar adapted to embrace a part of said neck and a slidable retaining .ring surrounding the body of the 1 hammer for maintaining the collar in engagement with the neck.

9. The combination with a mechanical hammer having a. body portion and a control device and a removabletool having spaced shoulders with an Iintermediate neck, of a holding device connecting the control device and the tool. said holding device extending along the body of the hammer and projecting forwardly therefrom. having on the projecting portion thereof a collar adapted to embrace a part of said neck and a slidable reholding device connecting the control device and the tool, said holding device extending alon the body of the hammer and projecting fbrwardly therefrom, having on the rojecting portion thereof a collar adapte to embrace a part of said neck, a slidable retaining ring surrounding the body of the hammer for maintainingA the collar in engagement with the neck, and means for preventing the removal of said ring.

`1l. 'lhe combination with a mechanical hammer having a body portion and a control device and a removabletool having spaced shoulders with an intermediate neck, of a holding device connecting the control device and the tool, said holding device extending along the body of the hammer and projecting forwardly therefrom, having on the projecting portion thereof a collar adapted to embrace a part of saidneck, a slidable retaining ring surrounding the body of the hammer for maintaining the collar in engagement with the neck, and means for'preventing the removal of said ring, the last mentioned means comprising spaced spring fingers arranged to engage annularly spaced grooves in the body of the hammer.

12. A tool having a` pair of spaced shoulders and an intermediate neck, a shank in axial alinement with said neck and extending therefrom, said shank being adapted to be inserted into thebarrel of a mechanical hammer` a faceof that one of the shoulders which is adjacent said shank being undercut to rovide for lateral engagement of a hol ing device extending from the barrel of the mechanical hammer to the neck of said tool.

13. A tool having a pair of spaced shoulders and an intermediate neck, a shank in axial alincment with said neck and extending therefrom, said shank being adapted to be inserted into the barrel of a mechanical hame WILLIAM F. OGORMAN.

tamlng ring surrounding the body of the hammer for maintaining the collar in engagement with the neck, an edge of the collar ing arranged to enter an undercut portion of one of said shoulders.

j 10. The combination withl a mechanical hammer having a body portion and a control device and a removable tool having spaced shoulders with an intermediate neck, of a 

